Utmoobarhcna compawy



(No Model.)

n LI m WA LM I m SB v No. 508,061.

Patented Nov. 7, 1893.

Wii'neG: I 76 6 nven'i-ow 1% AI. umoaumma COMPANY a menu a 1:

NITED STATES PATENT OFFICE.

CHARLES E. S'IILWELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE-UNION PAPER BAG MACHINE COMPANY, OF SAME PLACE.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent No. 508,061, dated November 7, 1893. A lication fil d April 1'7, 1893. Serial No} 470,624. (No model.)

To an whom it may concern:

Be it known that I, CHARLES E. STILWELL, a citizen of the United States, residing in Philadelphia, in the county of Philadelphia, in the State of Pennsylvania, have invented a certain new and useful Improvement in Paper- Bag Machines, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part of this specification.

Myinvention relates to paper bag machines 7 having the leading characteristics of the machines described in my Patents N 0. 407,7 94, of July 30, 1889, and No. 417,346, of December 17, 1889.

The object of my present invention is to substitute for the roller marked L in the patent of July a device which will-notengage the paper nor offer any resistance to its forward or backward movement, except 'at the time when the distension of thetu'be is being accomplished.

The nature of my improved device will be' best understood as described in connection with the drawings in which it is illustrated and which drawings represent a machine substantially identical, with the exception noted, of that shown in my'earlier patents.

In said drawings, Figure lis a perspective view of the parts of the machineimmediately connected with my improvement, and Fig. 2 is a vertical longitudinal section of said part of the machine.

A, indicates the frame; B, the lower feed roller having upon it gripping fingers B, one

of which is indicated in Fig. 1, and which in character and operation is the same as those shown in my earlier patents.

C, is the coacting feed roller resting upon the roller B.

D and D Fig. 2, are feed rolls acting to carry and deliver the blanks to the rollers B and C.

E is a roller placed in front of the rollers B and C, and under whichvthe blanks are fed as in my former machines.

F is the tucker operating between the rollers C and E, said tucker being actuated through a lever F attached to a rock shaft F. G is a guide bar supported on the bracket G attached to part of the frame.

countering resistance.

H, indicates a metal plate-lying to the rear of the guide bar G and extending somewhat over the feed roll I; J being the co-acting feed roll.

K is a rock shaft having at one end a lever K carrying a cam' roller K which rests against the periphery of a cam L.

K is another lever arm connected with the rock shaft K and to which is attached a spring K the action of which holds the cam roller K in contact with its cam.

M, indicates an upright arm, of which there are two attached to the rock shaft K, and to which arms are in turn attached the fingers M, M being rods extending downward from said fingers and carrying cam rollers M which rest'against cams N.

V ;-In all of the parts above described my present ma chine is in no wise different 1n construction or operation from the machines de-- scribed in my former patents, and it is not necessary therefore to elaborately describe the operation of said parts. Instead however, of providing a roller below the roller E and pressing againstiit at all times so as to nip the upper ply of the blank, I provide a spring finger P, thevend P of which rests beneath the roller E and is alternately carried up against said roller and down below and out of contact with. it; the mechanism actuating said spring finger carrying and holding it below the roller E while the blank is being fed beneath said roller, and then carrying it up to trip the blank against the roller E ust before and during the time when the fingers M are performing their function upon the blank, that is to say, engaging the upper corners of the upper ply of the blank Q and co-acting with the fingers B, which engage the corresponding corners of the lower ply, 1n distending the blank to the box like form shown 1n Fig. 1 and described in my former patents; immediately after the fingers M have performed their work upon the blank the sprin g finger is moved downward, releasing the upper ply of the blank so that it is drawn backward from beneath the roller E without en- In the plan shown,

the necessary movements are given to the finger P by attaching it to an'uprlght standard 0 attached in turn to the rock shaft K;

by this attachmentit is obvious that the finger P is thrown up at the same time with the fingers M which are also attached to the same rock shaft through their parts M. Obviously also the motion of the rock shaft K which throws the fingers M down also moves the spring finger P, thus disengaging the blank from the nip of the spring finger and the roller E.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a bag machine substantially as described, the combination With the roller B and the grippers B acting to engage the lower ply of the blank, of the fingers M M acting to engage the upper ply and coact with the fingers B in distending the blank, the roller ll, a spring finger P and means acting on said finger to move it to and from the roller E.

2. In a bag machine substantially as described the combination with the roller B and the grippers B acting to engage the lower ply of the blank, a rock shaft K, fingers M M connected with said shaft, a roller E lying above the points of said fingers and a spring finger P also connected with and actuated by the rock shaft.

CHAS. B. STILWELL.

Witnesses:

ALF. H. FABER, EDW. F. AYERS. 

